CN106166565A - Tensioner for rolling equipment - Google Patents

Abstract

Tensioner for rolling equipment (11), described tensioner include at least one milling train (46), at least one milling train described include being provided with idler roller (12) and can around the contact device (13) that rotary shaft (Z) rotates, be used for driving the actuating element (26) of described contact device (13), be used for measuring the detection device (17) of the power suffered by described contact device (13).Described contact device (13), described actuating element (26) and described detection device (17) are arranged to the most each other and partly align, in order to limit the main extension of the row type of described tensioner (10).

Description

Tensioners for rolling plants

technical field

The invention relates to a tensioning device for a rolling installation for detecting and adjusting the tension of a strip or sheet metal in an intermediate stand section between two adjacent rolling mills.

Background technique

Tensioning devices are known for hot-rolling equipment for sheet metal placed in an intermediate position between two adjacent rolling stands to detect and adjust the tension of the strip or sheet metal being processed in the intermediate stand section. under tension.

In order to impart the desired properties to the product and to achieve high quality standards, the tension of the strip or sheet metal is monitored.

For example, it is known that properties such as profile and flatness of a strip or plate depend on maintaining a proper and constant tension value throughout the rolling process, especially in intermediate stand sections where the strip or plate is not directly supported.

Tensioning devices are known comprising tensioning rollers mounted on supports and arranged in contact with the strip or plate in the intermediate stand section between two adjacent rolling mills.

The tension roller can be driven to interact with the strip or plate relative to the sensed tension value, acting on an on-axis hydraulic motor with support.

The tension value of the strip or metal plate is detected by a load cell mounted close to the tension roller.

Alternatively, strip or sheet tension values may be obtained by reading the position and/or pressure of hydraulic command devices.

A typical disadvantage of known types of tensioning devices for rolling installations is that they require a large installation space, which significantly affects the distance between one rolling stand and the next.

One disadvantage caused by the former tensioning device is that the large distance between the rolling stands leads to a drop in temperature of the strip or sheet during operation, which creates considerable drawbacks for the hot rolling step and would require Operate to restore temperature.

Another attendant disadvantage is that more energy is required to perform the same processing on a strip or sheet metal than would be required to perform the same step at a higher temperature.

Another disadvantage consists in the creation of sliding friction between the movable parts of the equipment supporting and moving the contact elements: this friction causes premature wear and inefficiencies and inaccuracies in the action of the tensioning device.

JP62156013 describes a tensioning device with a contact roller arranged at the end of the shaft of a hydraulic cylinder with a substantially vertical axis, the tension sensing element (in this particular case a load cell) arranged in a modified Below the hydraulic cylinder.

In this solution, the contact roller/hydraulic cylinder combination acts directly on the load cell, potentially damaging it and causing measurement inaccuracies.

US 5,718,138 describes a tensioning device with a contact roller associated with a support arm connected to the shaft of a hydraulic cylinder in order to define the desired height of the contact roller relative to the plane of laying of the strip or sheet metal. US 5,718,138 provides two methods of detecting the tension of the strip, the first using a load cell generally associated with the tensioning device and the second using the pressure value of a hydraulic cylinder.

Therefore, there is a need to perfect a tensioning device for a rolling plant which overcomes at least one of the disadvantages of the prior art.

In particular, an object of the present invention is to obtain a tensioning device, which is installed in the middle stand section, allowing to reduce the distance between two adjacent rolling mills compared to known tensioning devices , in order to minimize the temperature drop of the strip or sheet metal being processed.

It is therefore an object of the present invention to obtain a tensioning device that is compact and not bulky.

Another object of the present invention is to obtain a precise and reliable tensioning device and in which the friction caused by the sliding of the mobile parts is reduced.

Another object of the invention is to improve the accessibility of the measuring elements of the tensioning device for maintenance procedures.

Another object of the invention relates to the possibility of replacing the tensioning roller of the tensioning device when it is worn or broken without having to work in the vicinity of the measuring cell.

Another object of the invention is to locate the measuring element away from the area where the bar or metal plate moves, since, since the measuring element is a sensitive element, it should preferably be placed shielded from vibrations and dust.

Furthermore, it is an object of the invention to provide a simple and economical tensioning device.

The applicants have designed, tested and implemented the present invention to overcome the disadvantages of the state of the art and to obtain these and other objects and advantages.

Contents of the invention

The invention is set forth and characterized in the independent claims, while the dependent claims describe other characteristics of the invention or variants to the main innovative point.

According to the above objects, a tensioning device for a rolling installation comprising at least one rolling mill is provided.

According to the invention, said tensioning device comprises a contact device provided with: at least one tensioning roller configured to rest on the strip or metal plate and to place it in tension; at least an actuating element for driving said contact means and bringing it into contact with said strip or metal plate; and at least one detection means for measuring the force to which said contact means and thus said strip or metal plate tension.

According to the invention, said contact means, said actuating element and said contact means are arranged stacked one behind the other, so as to define the main extension of the column type of said tensioning means, in this way obtaining a very limited lateral extension A compact tensioner, for example, to allow positioning of two adjacent rolling stands of a rolling plant close to each other.

According to another feature, said contact means are arranged on a support element rotatable about an axis in a plane substantially parallel to the plane of laying and/or feeding of the strip or sheet metal.

According to one concept of the invention, said actuating element may be a linear actuator arranged vertically according to its largest dimension, thus during use substantially perpendicular to the plane of laying and feeding of said strip or metal plate.

According to a variant, said actuating element defines, during use, an angle other than zero with respect to the perpendicular of said strip or metal plate.

According to an aspect of the present invention, the tensioning device comprises at least one control device configured to receive from the detection device information about the tension between two adjacent rolling mills in one direction and/or A signal of the value of the tension on the tension roller of the metal strip or sheet advancing in the other direction.

The control means are thus adapted to compare the signal of the tension value with a predetermined value and, if different, to drive the contact means, for example, to rotate it in a clockwise or anticlockwise direction, in order to hold the strip Or the tension value of the metal plate is substantially equal to the optimum value.

There is also provided a rolling installation comprising at least two rolling mills, between which at least one tensioning device according to the invention is interposed.

Description of drawings

These and other features of the invention will become apparent from the following description of some embodiments given as non-limiting examples with reference to the accompanying drawings.

Figure 1 is a side view of a tensioning device for a rolling plant in a first operating condition according to embodiments described herein;

Figure 2 is a side view of a tensioning device for a rolling plant in a second operating condition according to embodiments described herein;

Fig. 3 shows a sectional view III-III of the tensioning device for rolling equipment in Fig. 1 .

To facilitate understanding, the same reference numbers have been used, where possible, to identify identical elements in the drawings. It should be understood that elements and features of one embodiment can be readily incorporated into other embodiments without further clarification.

detailed description

We will now describe in detail embodiments of the invention, one or more examples of which are illustrated in the accompanying drawings. Each example is provided by way of illustration of the invention, and should not be construed as a limitation thereof. For example, features illustrated or described to the extent that they are part of one embodiment can be applied to or related to other embodiments to yield a further embodiment. It should be understood that the present invention should include all such modifications and variations.

Before describing these embodiments, we must also clarify that this specification does not limit its application to the details of construction and arrangement of the components described in the following description using the accompanying drawings. The description is capable of other embodiments and of being obtained or carried out in various other ways. We must also clarify that the phrases and terms used herein are for descriptive purposes only and should not be considered limiting.

Referring to FIG. 1 , this figure is used to describe an exemplary embodiment of a tensioning device 10 used in a rolling plant 11 for detecting the movement of a metal strip 15 in the feed direction F1 according to the directions of the corresponding arrows. The tension value of the metal strip 15 advancing between the two rolling mills 46 .

According to some variants, in the case of reverse stands, the metal strip 15 can advance between the two rolling mills 46 in the direction of feed F1 and in the direction of feed F2 opposite to F1 according to the directions of the corresponding arrows.

According to some variants, the rolling installation 11 may comprise a plurality of rolling mills 46 .

According to a possible variant, the tensioning device 10 can be installed between two adjacent rolling mills 46 .

According to other variants, the tensioning device 10 may be installed between each pair of adjacent rolling mills 46 .

According to some variants, as described using FIG. 1 , both rolling mills 46 may comprise lower and upper work rolls 50 and 52 respectively arranged below and above the plane identified by the upper surface of at least one guide plate 44 , during operation, The metal belt 15 travels on the guide bar and the work rolls 50, 52 press the guide bar directly.

The lower work roll 50 and the upper work roll 52 may be, for example, cylindrical in shape with an elliptical extension in a direction perpendicular to the feed directions F1 and/or F2.

According to some other variants, both rolling mills 46 may also include lower back-up rolls 54 and upper back-up rolls 56, which are respectively arranged below the lower work roll 50 and above the upper work roll 52 to limit the rolling of the metal strip 15 during rolling. Bend of the metal strip.

The lower support roller 54 and the upper support roller 56 may be cylindrical in shape with an elliptical extension in a direction perpendicular to the feed direction F1 and/or F2.

The lower backup rolls 54 may be arranged tangentially to the lower work rolls 50 and the upper backup rolls 56 may be arranged to be tangent to the upper work rolls 52 .

In addition, the lower backup roll 54 and the upper backup roll 56 may have a larger size and mass than the lower work roll 50 and the upper work roll 52 .

The lower support roll 54 and the upper support roll 56 are movable closer to the respective lower work roll 50 and upper work roll 52 and closer to the metal strip 15 in the direction of the vertical axis X perpendicular to the feed directions F1 and/or F2 Placement/feeding plane to overcome wear phenomenon caused by rolling cycle.

According to some variants, as described using FIG. 1 , the tensioning device 10 may be positioned, for example, in an intermediate position between two rolling mills 46 .

The tensioning device 10 may comprise a contact device 13 , an actuation element 26 and a detection device 17 .

According to some variants, the contact means 13 may be arranged in the inactive position below at least one guide plate 44 supporting the metal strip 15 while it is being processed.

We have to clarify here that by "inactive position" we mean the position in which the tensioning device 10 is when the actuating element 26 is not actuated (i.e. the actuating element is not deployed), which generally corresponds to the contact means 13 does not rest on the metal strip 15 from below.

The guide plate 44 also defines the laying and feeding plane of the metal strip 15 between the two rolling mills 46 .

At least one guide plate 44 may have an interruption of suitable size according to the contact device 13, which in use, i.e. when it is rotated, is at least equal to the volume of the contact device in order to allow it to put the metal strip 15 under tension so as to pass through it. interrupted.

The contact device 13 is rotatable about an axis of rotation Z lying in a plane substantially parallel to the placement and feeding plane of the metal strip 15 and having a direction substantially perpendicular to the feeding direction F1 and/or F2 of the metal strip 15 .

According to some variants, the contact device 13 may comprise a tension roller 12 and a support element 14 .

The tension roller 12 may be cylindrical in shape with an elliptical extension in a direction substantially parallel to the axis of rotation Z.

Furthermore, the tension roller 12 may have an axis of rotation substantially parallel to the axis Z of rotation.

According to some variants, the support element 14 is arranged to support the tension roll 12 and may be mounted directly on the support strut 58 of the rolling mill 46 .

According to some other variants, the support element 14 may be mounted on a dedicated support structure, different from the support columns 58 of the rolling mill 46 .

According to a possible embodiment, the first pivot means can rotate the support element 14 about the axis of rotation Z to bring the tensioning roller 12 into contact with the metal strip 15 .

According to some other variants, the support element 14 can also be connected to the connection plate 19 .

Furthermore, the connecting plate 19 may in turn be connected to the support strut 58 of the rolling mill 46 and be clamped by the attachment element 42 .

According to some possible embodiments, the connection plate 19 may be mounted on a dedicated support structure different from the support columns 58 of the rolling mill 46 .

The contact device 13 can be in a first "inactive" position (see FIG. 1 ) at its minimum lower point resting on the largest hole of the lower mechanical stop 18 and at its maximum upper point resting on the largest hole of the upper mechanical stop 20 In at least a second position, as explained in more detail below.

According to some variants, the contact device 13 may also comprise a first position transducer 22 mounted in the center of the axis of rotation Z, which detects the position of the contact device 13 and thus also the tension roller 12 instantaneously.

The first position transducer 22 may be, for example, an angular or rotational position transducer, such as an angular encoder or a rotary encoder, in particular such as a tachometric encoder, a relative or incremental encoder or an absolute encoder.

According to some variants, the actuating element 26 may comprise on the inside a second position transducer 23 arranged in its axial direction.

The positioning of the second position transducer 23 inside the actuating element 26 allows detection of the deflection of the actuating element 26 and thus the position of the contact device 13 and thus of the tension roller 12 from the “inactive” position.

According to some feasible embodiments, the tensioning device 10 may include a first position transducer 22 and a second position transducer 23 to detect the position of the contact device 13 .

According to some variants, the contact means 13 may be connected to the actuation element 26 .

The actuation element 26 as used in the embodiments described herein may comprise corresponding drive members in the case of a single actuation element as well as in the case of several dedicated actuation elements.

The drive member may be selected from the group consisting of: electric motor, air motor, hydraulic piston, piezoelectric actuator. In general, actuators as used in connection with embodiments described herein may be actuators that have inherent linear motion or that are configured to convert circular motion to linear motion. This conversion is usually accomplished with a mechanism type selected from the group consisting of: screw actuators, such as nut screws, ball screw actuators, and roller screw actuators, or wheels and shafts, such as roller , gears, pulleys or shafts, actuators such as hoisting ropes, winches, rack and pinion sets, chain drives, belt drives, actuators with rigid chains and rigid belts.

Advantageously, the actuating element 26 can be a linear actuator.

The actuation element 26 may include a sleeve 28 and a shaft 29 configured to slide inside the sleeve 28 .

Furthermore, the actuation element 26 can be located below the contact device 13 in a direction substantially parallel to the direction indicated by the vertical axis X. As shown in FIG.

According to some possible variants, the actuation element 26 may be mounted at an angle relative to the direction identified by the vertical axis X.

Merely as a non-limiting example, the actuation element 26 may be tilted between -35° and +35° with respect to the direction identified by the vertical axis X.

According to some variations, the actuating element 26 may be provided with a first end 30 and a second end 32, wherein the first end 30 may correspond to the distal portion of the shaft 29 and the second end 32 may correspond to the distal portion of the sleeve 28. correspond.

According to some variants, the actuating element 26 may be connected by an oscillating pin acting on the center line of the actuating element 26 .

The connection between the contact means 13 and the actuation element 26 is accomplished by pivoting the first end 30 of the shaft 29 to the support element 14 .

According to some variants, the actuation element 26 may be mounted so as to be connected to the detection means 17 via the second end 32 .

Furthermore, the detection means 17 may be located below the actuation element 6 in a direction substantially parallel to the direction marked by the vertical axis X.

According to some possible variants, the detection device 17 may be located below the actuating element 26 so that the two parts are not perfectly aligned, i.e. so that a certain angle of inclination is formed between them, when the detection device 17 detects the tension value of the metal strip 15 The detection device takes this tilt into account.

According to some possible embodiments, the detection device 17 may comprise a connection element 34 , a sensor device 38 and a support frame 40 .

According to other feasible embodiments, the detection device 17 may further include a support plate 37 .

The connection between the actuation element 26 and the detection means 17 can be done by pivoting the second end 32 to the connection element 34 .

According to some variants, the connecting element 34 is arranged rotatably and mounted directly on the support column 58 of the rolling mill 46 .

According to some possible embodiments, the connection element 34 may be mounted on a dedicated support structure different from the support columns 58 of the rolling mill 46 .

According to some other variants, the connecting element 34 can in turn be rotated relative to the support plate 37 to which the second pivot means are connected.

Furthermore, the support plate 37 may be connected to a support column 58 of the rolling mill 46 and clamped by the attachment element 42 .

According to some possible embodiments, the support plate 37 may be mounted on a dedicated support structure different from the support columns 58 of the rolling mill 46 .

The connecting element 34 is rotatable about an axis of rotation parallel to the axis of rotation Z and thus perpendicular to the feed directions F1 and/or F2 .

According to some variants, below the connecting element 34, in a direction parallel to the direction indicated by the vertical axis X, the sensor device 38 may be positioned to measure Tension on belt 15.

According to some possible variants, the sensor device 38 can be located below the connecting element 34 so that the two elements are not perfectly aligned, i.e. so that a certain angle of inclination is formed between them, when the sensor device 38 detects the tension value of the metal strip 15 the sensor The device takes this tilt into account.

The sensor device 38 can be supported by a support frame 40 and can be stably connected thereto via an attachment element 42 .

The support frame 40 may be located below the sensor device 38 in a direction parallel to the direction indicated by the vertical axis X. As shown in FIG.

According to some variants, bracket 40 may be connected to support plate 37 by means of attachment elements 42 .

Alternatively, the support frame 40 may be directly connected to the support columns 58 of the rolling mill 46 and clamped by the attachment elements 42 .

According to some possible embodiments, the support frame 40 may be mounted on a dedicated support structure different from the support columns 58 of the rolling mill 46 .

In some embodiments, provided as non-limiting examples, sensor assembly 38 may include one or more sensors to detect actuation due to tension on metal belt 15 caused by work rolls 50 , 52 and tension roll 12 traction. The force exerted by the element 26 on it.

It should be noted here that the one or more sensors included in the sensor arrangement 38 as used in embodiments described herein may be at least one sensor element selected from the group consisting of:

- force sensors or transducers, such as load cells, for example load cells with extensometers, hydraulic or hydrostatic load cells, piezoelectric load cells, vibrating wire load cells or capacitive load cells;

- pressure sensors or transducers, e.g. electronic sensors typically used to collect force to measure deformation or deflection caused by a force applied to an area, such as sensors with piezoresistive extensometers, capacitive sensors, electromagnetic sensors, Piezoelectric sensors and optical or potentiometric sensors.

It should be understood that, depending on the specific arrangement of the sensor device 38, the sensor device may also include at least one pressure sensor and at least one force sensor, eg a load cell.

According to various implementations of the embodiments described herein, the force exerted on the sensor assembly 38 may be measured by one or more load cells using extensometers, piezoelectric elements, piezoresistive elements, Hall effect elements, etc., a or multiple pressure sensors or one or more other sensor detection. Thus, pressure must be considered as force applied per unit area, so that depending on whether one or more sensors are provided as pressure sensors or force sensors or load cells, conversions may need to be considered.

According to some feasible embodiments, a control device 24 can also be provided, which is configured to receive a signal from the detection device 17 related to the tension value of the metal strip 15, the metal strip acts on the tension roller 12, and is arranged to Advances between two adjacent rolling mills 46 .

Furthermore, the control means 24 are adapted to compare the value of said signal with a predetermined optimum value and reversibly command the rotation of the contact means 13 in one direction or the other in order to reduce or increase the pressure on the tension roller. 12, the applied pressure of the metal strip 15 conveyed so as to keep the tension value of the metal strip 15 equal to the optimal value substantially.

According to some other variants, as described with reference to FIG. 2 , the tensioning device 10 is provided in a second operating state in which the contact device 13 is rotated by an angle from the “inactive” position so that it rests on the upper mechanical stop 20 . Thus, angles comprised between 0 and the value relating to the position involving the largest hole identify all intermediate positions between the "inactive" position and the latter, respectively.

According to some variants, described again with reference to FIG. 2 , the shaft 29 of the actuating element 26 finds itself in this condition when it is at the maximum possible travel relative to the other positions that the contact means 13 can ensure.

Depending on the force with which the actuating element 26 is driven, a force is thus generated that has the same direction and the same strength but feels opposite due to the counterforce produced by the metal strip 15 under tension.

The sensor means 38 measure this force, and if the force differs from the predetermined force, the control means 24 sends a signal to rotate the contact means 13 by a predetermined angle or to move the actuating element 26 by a certain stroke.

Advantageously, the point of contact between the tension roller 12 and the metal strip 15 can be arranged almost centrally between two adjacent rolling mills 46, so that the actuating element 26 is subjected to a force perpendicular to the feed direction F1 and/or F2 as far as possible. And thus a reaction force as parallel as possible to the vertical axis X. This makes the measurements performed by the sensor device 38 repeatable under constant occurrence conditions.

According to some variants, as described with reference to FIG. 3 , the tensioning device 10 may comprise at least one contact device 13 , at least one actuation element 26 (for example two) and at least one detection device 17 (for example two), the at least one The contact device may then comprise at least one tension roller 12 and at least one support element 14 (eg two).

According to some other variants, if the tensioning device 10 comprises, for example, one tensioning roller 12, two support elements 14, two actuation elements 26 and two detection means 17, then the support element 14, the actuation elements 26 and the detection means 17 The arrangement can advantageously be made according to the elliptical extension of the distal end portion of the tensioning roller 12 .

The use of two detection means 17 makes it possible to detect slightly different tension values of the metal strip 15 than the control means 24 can process and adjust, resulting in a further refinement of the retrospective adjustment of the tensioning means 10 .

It is obvious that modifications and/or additions may be made to the tensioning device 10 described above without departing from the technical field and scope of the present invention.

It should also be clear that although the invention has been described with reference to some specific examples, those skilled in the art will surely be able to obtain many other equivalents for the tensioning device 10, so that all the features set forth in the claims and therefore 10 are all hereby within the limited scope of protection.

Claims (18)

1. it is used for detecting and regulating the tensioning of the tension value of the metal tape (15) in rolling equipment (11) Device, described tensioner includes at least one milling train (46), and described tensioner includes:

-be provided with at least one idler roller (12) at least one contact device (13)；

-it is used for driving at least one actuating element (26) of at least one contact device (13) described；

-for measuring at least one inspection of the power suffered by least one described contact device (13) Survey device (17),

It is characterized in that, at least one contact device (13) described, at least one actuating element described (26) it is arranged to the most each other and one by one with at least one detection device (17) described Partly align, in order to the main body of the pillar limiting described tensioner (10) extends, described inspection Survey device (17) and be arranged in described actuating element (26) lower section, in order to detect described metal tape (15) Tension value, and be further characterized in that, described contact device (13) include at least one its on Equipped with the support component (14) of described idler roller (12), described support component (14) can be around rotation Rotating shaft (Z) rotates, and one of end (30) of described actuating element (26) is at described rotary shaft (Z) And a centre position between described idler roller (12) is connected on described support component (14).

Tensioner the most according to claim 1, it is characterised in that described detection device (17) It is connected with described actuating element (26) by connecting element (34), described connecting element (34) Can rotate relative to pivoting device (36).

Tensioner the most according to claim 1 and 2, it is characterised in that described actuating element (26) it is linear actuator.

4. according to the tensioner described in any one of claim 1-3, it is characterised in that described The support pillar (58) that support element (14) is configured to described milling train (46) associates.

5. according to the tensioner described in any one of claim 1-3, it is characterised in that described It is special that support element (14) is configured to the support pillar (58) being different from described milling train (46) With in supporting construction association.

6. according to the tensioner described in any one of aforementioned claim, it is characterised in that described in connect Touch device (13) to rest in it in its primary importance rested in lower electromechanical stop (18) Rotate between at least one second position of largest hole in upper electromechanical stop (20).

7. according to the tensioner described in any one of aforementioned claim, it is characterised in that through extremely The interruption of a few guide plate (44) extends the extension of described at least one milling train (46).

8. according to the tensioner described in any one of aforementioned claim, it is characterised in that at least One primary importance changer (22) and/or at least one second position changer (23) are with described In contact device (13) association.

Tensioner the most according to claim 8, it is characterised in that described primary importance converts Device (22) and/or described second position changer (23) are encoders.

Tensioner the most according to claim 8 or claim 9, it is characterised in that described second Put changer (23) to be arranged on the axis of described actuating element (26) and therein.

11. according to the tensioner described in any one of aforementioned claim, it is characterised in that described Detection device (17) includes at least one connecting element (34), at least one sensor device (38) With at least one bracing frame (40).

12. tensioners according to claim 11, it is characterised in that at least one biography described Sensor arrangement (38) includes being arranged in described actuating element (26) lower section and substantially connecing with it At least one force cell touched.

13. according to the tensioner described in any one of aforementioned claim, it is characterised in that described Tensioner includes that at least one controls device (24), and at least one control device described is configured to Receive relevant direction of feed (F1) or direction of feed (F2) from described detection device (17) The signal of the tension value of the metal tape (15) advanced, compares described tension value with predetermined value, And if described tension value is different from predetermined value, then order described contact device (13) in up time Pin or upper rotation, in order to the tension value of described metal tape (15) is decreased or increased, So that described tension value returns to optimum.

14. according to the tensioner described in any one of aforementioned claim, it is characterised in that described Tensioner is arranged between two milling trains (46), and said two milling train all includes under at least one Working roll (50) and at least one top working roll (52).

15. tensioners according to claim 14, it is characterised in that described milling train (46) Also include at least one lower backing roll (54) and at least one upper backup roll (56).

16. 1 kinds of rolling equipments, described rolling equipment includes at least one milling train (46) and metal tape Or sheet metal (15), it is characterised in that described rolling equipment includes according to claim 1-15 In any one described in and be directly installed on the support pillar (58) or of described milling train (46) At least one tensioner (10) in special support structures.

17. rolling equipments according to claim 16, exist including limiting described metal tape (15) Placement in direction of feed (F1, F2) and the guide plate (44) of feeding plane, it is characterised in that institute State support component (14) rotate around rotary shaft (Z) be positioned at and described metal tape (15) In the plane that described holding plane is substantially parallel and have basic with described direction (F1, F2) Upper vertical direction.

18. according to the rolling equipment described in claim 16 or 17, it is characterised in that described rolling Equipment includes the milling train (46) of reverse type.